Robtex

Up: 37.52.40.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 37.52.40.0/23
Down right: 37.52.42.0/23

IP	Type	Hostname
37.52.40.0	A+PTR	0-40-52-37.pool.ukrtel.net
37.52.40.28	A+PTR	28-40-52-37.pool.ukrtel.net
37.52.40.47	PTR	47-40-52-37.pool.ukrtel.net
37.52.40.48	PTR	48-40-52-37.pool.ukrtel.net
37.52.40.132	A+PTR	132-40-52-37.pool.ukrtel.net
37.52.41.0	A+PTR	0-41-52-37.pool.ukrtel.net
37.52.41.113	A	113-41-52-37.pool.ukrtel.net
37.52.41.133	A+PTR	133-41-52-37.pool.ukrtel.net
37.52.41.250	A	250-41-52-37.pool.ukrtel.net
37.52.42.0	A+PTR	0-42-52-37.pool.ukrtel.net
37.52.42.20	A+PTR	20-42-52-37.pool.ukrtel.net
37.52.42.29	A+PTR	29-42-52-37.pool.ukrtel.net
37.52.42.113	A+PTR	113-42-52-37.pool.ukrtel.net
37.52.43.0	A+PTR	0-43-52-37.pool.ukrtel.net
37.52.43.73	A+PTR	73-43-52-37.pool.ukrtel.net
37.52.43.95	A	95-43-52-37.pool.ukrtel.net
37.52.43.147	A+PTR	147-43-52-37.pool.ukrtel.net
37.52.43.171	A+PTR	171-43-52-37.pool.ukrtel.net
37.52.43.195	A+PTR	195-43-52-37.pool.ukrtel.net